Door-mortising machine



- 1,621 061 March 15, 1927. R. L. CARTER DOOR MORTISING MACHINE FiledDec, 2, 1925 2 Sheets-Sheet; 1

March 15, 1927.

. 1,621,061 R. L. CARTER v DOOR MORTISING MACHINE Filed Dec. 2. 1925 2Sheets-Sheet 2 Patented Mar. 15, 1927.

barren srsrss RAY L. CARTER, OF PHOENIX, NEW YORK.

DOOR-MORTISING MACHINE.

Application filed December 2, 1925. Serial No. 72,722.

This invention relates to improvements in portable mortising machines,designed espe- 'cially for preparing doors for the reception of thewell-known mortise locks. 7

The invention relates particularly to improvements in the mortisingdevices shown and described in my pending application filed April 8,1925, Serial No. 21,601.

The object of the present invention is to provide a hand-controlledpower" driven 'mortising and routing device, in which the tool isoperatedby an electric motor, the motor and tool being oscillatedmanually in planes to suit the lay oft-he work. A further object is toprovide a novel adjustable bracket thatsupports the mortising mechanismand may be readily and quickly clamped to the edge of a door or otherpart. A further object is to provide a novel shoe, which directly andpivot-ally supports the motor and its housing, the said shoe being--slidable measured distances upon an arm of the bracket forprogressively sinking, as well. as for withdrawing the tool from amortise. A further, object is to provide novel means for automaticallyjogging the motor and tool towards the work atv each stroke of theoperating handle during.- the mortising operations. A further object isto provide novel and simple means for gaging theoscil-lations of thetool and motor for varying one dimension of the mortises. And a furtherobject is to generally improve and simplify the construction,arrangement and operation of mortising machines of this class. r 1

The various features and parts of the invention will be understood fromthe detailed description which'follows, and by reference to theaccompanyingdrawings, in which Figure 1 is a front side elevation of thecomplete device mounted upon a door or like part, in the act of sinkinga mortise. Fig. 2 -is'-'a bottom side view of the same- ;Fig. 3 is a'top side view of the device. Fig. 4.15 a 'rear side elevation, in whichthe full lines show the bracket, theshoe, and the jogging ==mechanism,aswhen the handle is-depressed; the dotted lines showing the motor andtool, and'a lso thejoggingpartsoperated by the -.lifting of-the handle.Fig. 5 isa horizontal section, taken on line 6-6 of'Fig. 2, Fig. 6 is asimilar .section,-taken on line 66 of Fig.2. I :Fig. 7- is-a rear-endelevation of the complete machines {Fig.8 is aside, elevation of themotor and holder, and Fig. 9 isa rear-end elevation of the same. a f 1 Jin the'sdrawings, the motor 2 is enclosed by-the usual cylindricalcasing 2.: 2 represents the armature shaiit, which extends bee yond thefront end of the motorkand. supports and drivesLthetool-ES andvitstubular shank- 8". The encased motor is supported by a hollow holder 4,Whose leg. l iis pivotally mounted upon a pin or post-'4, thesaid legbeing split, as atlt, and being provided with a bolt 4 bywhich theholderma y; be adjustably clamped to thepost; The .motor and its holderare rotatably supported by a shoe 5, as best seen in Figs. 2, 8, 5 and6; the shoe being slidably mounted upon. a

guide-arm 6 of a. bracketGQandthe lateral edges of said arm being formedWith1.V- shaped grooves 6 which are engaged re: spectively by a tongue5", and by theconical end of a set-screw 5 carried "by thelshoe, .asbest seen in Fig. .7. p The bracket 6 comprises a body 6, whose oppositeends are formed with si1nilar =hollow legsflfifigwhich pivotally supportdifferential screws 7+7,

the top ends of. said screws beingfitted with handknobsp The screws :77=each.control a' pair of clamping members, as.7 ,.the

saidmembers being formed with threaded 7 hubs or bosses 7 that receivethecorrespond- -ing screws; .the members 7 being adapted to move towardsor away, from the members 7 by the rotation of the screws 7-,7, asindicated by the directions of :the threadsv (see Figs. 2, 3 and 7)."The legs 6 and also-the corresponding membersH-W- are formed withaligning perforated lugs/7 which support similar guide-rods 8,thelatteiparah leling the screws 7-7. and having-their lower endsanchored in the legs,6' .,--By-;this

construction and arrangement, the members 7 7 register withe'ach.,;other, yjandwth bracket may be readily, quickly andrigidlyclamped tovdoors or other .workuof different thicknesses. Arepresents;awfragment ofa door, in which a partially wrough-tianortiseis shown. The shaft 2*,betweeh-the, motor,

and-the toolS, is preferably supportedbya relatively longtubular shank2, one endof which is knurled and secured,to' tl1e motor casing by anysuitable-means (not Shawn). The 'motor and tool may be oscillated orrocked in the plane of the door A, as shown in Figs. 1, it, 5' andG, bymeansofa handle t) which is detachably.supportedby a threaded no I boss1 formed at one side of the holder 4. During the mortising, the handle 9is operated like a pump-handle. The rocking movements of the motor andtool are regulated by a pair of blocksor nuts 10, which are adiustablymounted upon a differential screw the said blocks being square forconveni one end of the screw 10.

from the outer surface of the shoe.

ience and contacting with the shoe 5, for preventing their rotation,andbeingmov able'towards and away from each other simultaneously, fordecreasing and increas ing their spacings, by the turning of a knurledknob 10*, which is. mounted upon The screw 10 is which rise supported byperforated lugs 5 The ' blocks 10 gage the oscillations of a finger orstud 4, which is supported by the holder 4:,

i as best seen in Figs. 3, 5 and 6,

bolts 12", to a 7 that loosely surrounds the guide 6 and the Figs. 5,6and 7. the opposite The motor and tool, and also the shoe are jogged ormoved towards the work (A), by means of a ratchet-rack12,.which isrigidly secured to the rear face of the guide 6, and

a'pair of oppositely facing toothed dogs or pawls 1212"-, the latterbeing pivoted by flattened collar or sleeve 13 shoe 5. The sleeve 13 ispreferably pivoted .to the shoe by a bolt 13, and is rockable inone-direction in the plane of the door and guide 6, as shown in Figs.1,5 and 6, by means of in the leg L -of the holder (see Figs. 5, 6, 8and 9), and engages a cam 14 which is mounted upon the sleeve 13, asbest seen in I Sleeve 13 is operated in direction by .apiston or bolt15, which 'is reciprocatable in a socket formed' n a boss 5 of the shoe,the said piston being extended (see Figs. 1, 3, a

and 6)-by aspring 15., as shown in Fig. 6.

' According to this novel arrangement of the said parts, when the handle9 is depressed,

.as'shown in Fig. 5, the roll-er it moves over the angular face 1 1 ofthe cam (see Fig. 5),

' and rocks the sleeve 13 on. the pivot 13,

I into the socket.

forwardly along in the direction for forcing the piston 15 This movesthe dog 12" v the rack 12 the extent of one tooth; and while the dog 12is thus being advanced, the dog'12 holds fast to the rack and causes theshoe, the motor and the tool, to be correspondingly towards themortising position. The liftadvanced ing of the handle9, moves theroller 14 back Pinto the bight of the cam, shown at 14* in ig. 6, andallows the tension of spring 15 {to swing the sleeve 13 V in theopposite direction" (as shown in Fig. 6), which eifects the advanceofthe pawl 12, while the pawl 12' holds fast. At each rocking of thesleeve 13 by theswinging of the handle 9, the pawls E -12 arealternately jogged forwardly "tooth tooth, along the rack 12. This cor-V respon'dingly moves the tool 3 for deepena roller 14, which is pivoteding the mortise, as explained. Owing to the peculiar shape of the cam 14the advance of the motor at the start of each rocking movement of thehandle is almost imperceptible, and the initial cutting by the tool isso slight, that danger ofstalling the tool is obviated, However, as thehandle continues itsswing, the roller 1% engages the angular face 14 ofthe cam, which rocks the lower end of the sleeve 13 rearwardly,asindicated in Fig. 6 andeifects the gradual advance, and increases thedepth of the cutting by the tool to the endof the stroke, as 7 shown bythe dotted lines a; in Fig. i. This provision enables the machine toeffect uniform work, and permits the handle 9 to be operated rapidlywithout danger of jamming the tool or distorting the mortise.

The depth of the mortises may be accu rately gaged, by means of a pin16, which is arranged to be set 111 any one of a number 7 ofhol-es 16,which are formed in the guide clamping of the device to a door or likepart, the novel and simple means for gaging the oscillations of themotor and tool, and m the extremely simple and effective cam action, bywhich the sleeve 13 is rocked in 'one direction, for jogging the tooltowards the work and the reverse movementof the sleeve being effected bythe tension-controlled member15, greatly reduces the number of workingparts, and facilitatesthe ready and accurate adjustment and operation ofthe machine.

Having thus described what I claim,is-

1. In a mortising machine, a motor, a hoider for the motor, a tooldriven by the motor, a handle for oscillating the motor and tool, aroller carried by the holder, and 1 a sleeve having a cam portion inconstant engagement with the roller, said cam'portion b8111 arran "ed toeffect variable forward movements of the tool during'each oscillation ofthe motor. I, I

2; In a door mortising machine, a motor, a holder for the motor, a tooldriven by the motor said tool and said motor adapted to be oscillatedmanually, a roller carried by the p holder, and a sleeve having a camportion. in constant engagement with said roller adapted to be rocked bythe roller foreifecting a graduated cutting by said tool.

3. In a door mortising machine, an encased motor, a tool drivein by themotor my invention, 1

adapted to be oscillated manually by a handle carried by the motorcasing, a slidable shoe upon which the motor is pivoted, a rollercarried by the motor casing, and a sleeve pivoted to the shoe and rockedby said roller for eii'ecting the forward movement of the motor and toolduring the mortising operations. I r

4. In a mortising machine, a bracket having a guide-arm, a shoe slidableon said arm, an encased motor pivoted on the shoe adapted to beoscillated by a hand-lever, a tool driven by the motor, a joggingmechanism supported jointly by said arm and said shoe, a rockable sleevefor actuating the jogging mechanism said sleeve having a cam portion,and a member carried by the motor casing in constant engagement with thecam portion of said sleeve adapted to effect the movement of the sleeveat variable speeds during each oscillation of the motor, and means foroscillating the motor and tool.

5. A, mortising machine including a bracket having a guide-arm, a shoeslidable on said arm, an encased motor pivoted on the shoe adapted to bejogged towards the 1 work by its oscillations, a tool driven by themotor, a mechanism for jogging the motor and tool comprising a rack anda pair of dogs, a rockable sleeve for actuating the jogging mechanism, amember carried by the motor casing in constant engagement with saidsleeve adapted to effect the movement of the sleeve at variable speedsduring each oscillation of the motor, means for oscillating the motorand tool, and means for gaging the oscillations of the motor for varyingone dimension of the mortise.

6. In a mortising machine, an enclosed oscillatable motor, a. tooldriven by the motor, a handle for rocking the motor and tool in oppositedirections during the sinking of a mortise, a screw adapted for gagingthe eX- tent of the rocking movements of the motor, a roller adapted toeflect the jogging of the tool towards the work when the handle is swungin one direction, and tension controlled means for jogging the tooltowards the work while the handle is being swung in the oppositedirection.

7. A mortising machine, including an encased motor, a tool driven by themotor, a support for the motor, a pair of screws for adj ustablyclamping the support to the work, means foroscillating the motor foreffecting the measured jogging of the motor and tool towards themortising position, means for gaging the oscillations of the motor forvarying one dimension of the mortise, a cam mechanism for jogging thetool while the motor is being oscillated in one direction,tension-controlled means for jogging the tool while the motor is beingoscillated in the opposite direction, and means for increasing the depthof the cutting by the tool during each oscillatory movement ofthe motor.I

8. In a mortising machine, a bracket adapted to be clamped to a door orother part having a guide arm provided with lateral grooves, a shoeslidable on said, guide arm and having tongues that engage said grooves,an encased motor pivoted to said shoe and supporting and driving amortising tool, a

finger movable with the motor casing, a

screw mounted on the shoe, gage-blocks threaded to said screw betweenwhich said finger plays adapted to be moved towards and from each otherfor varying the sweep of said finger, means for'oscillating said motorduring the mortising operations, means for jogging the motor and tooltowards the mortising position, and means comprising a cam and a tensioncontrolled device for alternately effecting the jogging work.

9. In a door mortising device, the combination with a bracket adapted tobe clamped to a door and having a guide arm formed with lateral groovesextending away from the door, of a member slidable on said arm havingparts that play in said grooves, a rack carried by said arm, a sleevepivoted to said member, a pair of dogs supported by said sleeve havingteeth engaging said rack adapted to alternately jog said member towardsthe door by the rocking of said sleeve, a motor supported by a holderpivoted on said member, a tool driven by the motor, a' roller carried bysaid holder adapted to rock the sleeve in one direction, means carriedby said member for rocking the sleeve in the opposite direction, andmeans for the motor and tool.

oscillating In testimony whereof I aflix my signature.

RAY L CARTER. i

